The Flintstones in Viva Rock Vegas is a 2000 American family-romantic comedyfilm and prequel to 1994's The Flintstones based on the 1960-66 cartoon series of the same name. Produced by Amblin Entertainment and Hanna-Barbera Productions and distributed by Universal Pictures, it is set before the events of the first film and featured very few of the original cast. Despite receiving slightly more positive reviews than the first film, Viva Rock Vegas bombed at the box office. Ann-Margret, who appeared as 'Ann-Margrock' in the original series, sings the theme song, which is a slightly rewritten version of the theme song from Viva Las Vegas. Show Less